Iron tower foundation reinforcing structure and construction method

Abstract

The invention provides an iron tower foundation reinforcing structure and a construction method, the iron tower foundation reinforcing structure comprises a tower footing base, a tower foot and an underground pile foundation, the underground pile foundation is fixedly connected with the tower footing base, and the tower foot is fixedly mounted on a connecting block arranged on the tower footing base through an assembly bolt; the upper traction disc and the lower traction disc are connected through a plurality of external insulation traction connecting columns which are arranged in an annular array; the bottom of the anchor rod disc is connected with a plurality of fixed anchor rods in an annular array mode, the fixed anchor rods are anchored in a rammed earth layer below the ground, and at least two sets of concentric circle equipotential rings are further arranged among the traction rods. The traction discs are additionally arranged on the tower footing base and the tower feet, so that the lateral anti-traction strength and pulling resistance of the iron tower are improved, in addition, the external insulation traction connecting columns and the traction rods serve as electric conduction mechanisms for abnormal electric leakage of the power transmission tower, the risk that personnel and livestock at the bottom of the tower footing suffer from step voltage is effectively avoided, and the safety of the power transmission tower is improved. And the safety in the power transmission process is fully ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission tower reinforcement foundation, in particular to a tower foundation reinforcement structure and a construction method. Background Art

[0002] The prior art discloses a tower foundation reinforcement structure and method with publication number "CN119352593A". The tower foundation reinforcement structure includes a pedestal, inclined anchor rods, a cushion layer and grouting holes. Grouting holes are opened in the soil around the original tower foundation along the circumference of the original tower foundation and pressure grouting is performed. By squeezing the soil around the original tower foundation and penetrating the slurry, voids and cracks are partially filled, thereby improving the bearing capacity; a pedestal is formed on the original tower foundation and coordinated with the use of inclined anchor rods to improve the pull-out resistance and lateral support force of the original tower foundation, thereby achieving a reinforcement effect on the original tower foundation, enhancing the stability of the tower foundation in complex working conditions and harsh environments, and ensuring the normal and safe operation of the transmission line.

[0003] However, the above-mentioned device still has obvious defects during use: the above-mentioned device uses grouting to reinforce the iron tower. The construction process of this reinforcement method is complicated, and it can only complete the reinforcement of the iron tower base. The function is relatively single and it is difficult to adapt to the multi-purpose requirements of the existing transmission tower base. Summary of the Invention

[0004] The object of the present invention is to provide an iron tower foundation reinforcement structure and a construction method to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An iron tower foundation reinforcement structure, comprising a tower base, tower feet and underground pile foundations, wherein the underground pile foundations are fixedly connected to the tower base, and the tower feet are fixedly mounted on connection blocks provided on the tower base by assembly bolts;

[0007] An upper pulling disc is fixedly mounted on the tower foot, and a lower pulling disc is fixedly mounted on the periphery of the tower base. The upper pulling disc and the lower pulling disc are connected by a plurality of external insulating pulling connection columns arranged in a ring array.

[0008] An anchor plate is also provided on the periphery of the tower base, and a plurality of fixed anchor rods are connected to the bottom of the anchor plate in a circular array. The fixed anchor rods are anchored in the rammed earth layer below the ground. The lower pulling plate and the anchor plate are fixedly connected by a plurality of pulling rods that are consistent with and correspond to the external insulating pulling connection columns.

[0009] The upper pulling disk is fitted against the tower foot and a conductive block is provided on one side. The conductive block is electrically connected to the wire arranged inside the outer insulating pulling connecting column. The outer insulating pulling connecting column is electrically connected to the pulling rod. There are also no less than two groups of concentric equipotential rings arranged between several of the pulling rods. The pulling rods and the current on the tower foot are introduced into the ground through the concentric equipotential rings.

[0010] Preferably, the upper pulling disc and the lower pulling disc are each composed of a pair of semicircular disc structures, and are fixedly mounted on the tower foot and the tower base respectively by means of bolt fastening.

[0011] Preferably, the upper pulling plate and the anchor rod plate are connected by a plurality of insulating cables arranged in a ring array.

[0012] Preferably, the anchor plate and the concentric equipotential rings are both buried below the soil layer.

[0013] Preferably, the upper pulling disk, the lower pulling disk and the anchor rod disk are correspondingly provided with pulling connection threaded holes for connecting the external insulating pulling connection column, the pulling rod and the insulating cable.

[0014] Conductive rings are provided in the semicircular disk bodies on both sides of the upper pulling disk, and the conductive rings are fixedly connected to the conductive blocks. A connecting hole is provided on the conductive rings. When the outer insulating pulling connecting column is fixedly connected to the upper pulling disk through the pulling connecting threaded hole, the wire provided therein is inserted into the connecting hole provided on the conductive ring, thereby electrically connecting the outer insulating pulling connecting column to the tower foot.

[0015] A tower foundation reinforcement construction method, using the above-mentioned tower foundation reinforcement structure, comprises the following steps:

[0016] Step 1: Fix the upper pulling disc and the lower pulling disc on the tower foot and tower base respectively by fastening bolts, and connect the upper pulling disc and the lower pulling disc by external insulating pulling connecting column;

[0017] Step 2: Anchor the fixed anchor rod in the rammed earth layer below the ground. After the anchoring is completed, the anchor rod plate and the fixed anchor rod are fixedly connected in sequence;

[0018] Step 3: Use the pulling rod to fix the anchor plate to the lower pulling plate, and install two sets of concentric equipotential rings on the pulling rod. After installation, cover the pulling rod, concentric equipotential rings and lower pulling plate with soil so that they are in the soil;

[0019] Step 4: Fix the upper pulling plate and the anchor plate together through the insulating cable.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention improves the lateral tensile strength of the iron tower by adding pulling discs to the tower base and tower feet, and improves the pull-out resistance of the tower feet by setting fixed anchor rods and anchor rod discs. In addition, the external insulated pulling connection column and pulling rod also serve as the electrical conduction mechanism for abnormal leakage of the transmission tower, and concentric equipotential rings are designed to balance the potential differences around the tower foot as the center, effectively eliminating the risk of step voltage for people and livestock at the bottom of the tower base, and fully ensuring the safety of the power transmission process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the connection structure of the upper pulling disk and the lower pulling disk of the present invention;

[0024] Figure 3 Schematic diagram of the electrical conductive connection structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the connection structure between the upper pulling plate and the anchor plate of the present invention;

[0026] Figure 5 This is a schematic diagram of the upper pulling disc connection structure of the present invention;

[0027] Figure 6 It is a schematic cross-sectional view of the semicircular disc structure of the upper pulling disc of the present invention.

[0028] In the figure: 1 tower base, 2 tower foot, 3 underground pile foundation, 4 upper pulling disk, 5 lower pulling disk, 6 external insulating pulling connection column, 7 anchor plate, 8 fixed anchor, 9 conductive block, 10 pulling rod, 11 concentric equipotential ring, 12 insulating cable, 13 pulling connection threaded hole, 14 conductive ring. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-6 , the present invention provides a technical solution:

[0031] Example 1:

[0032] A tower foundation reinforcement structure includes a tower base 1, a tower foot 2 and an underground pile foundation 3. The underground pile foundation 3 is fixedly connected to the tower base 1, and the tower foot 2 is fixedly installed on a connection block provided on the tower base 1 by assembling bolts;

[0033] An upper pulling disc 4 is fixedly mounted on the tower foot 2, and a lower pulling disc 5 is fixedly mounted on the periphery of the tower base 1. The upper pulling disc 4 and the lower pulling disc 5 are connected by a plurality of external insulating pulling connection columns 6 arranged in a ring array;

[0034] An anchor plate 7 is also provided on the periphery of the tower base 1. A plurality of fixed anchor rods 8 are connected to the bottom of the anchor plate 7 in a circular array. The fixed anchor rods 8 are anchored in the rammed earth layer below the ground. The lower pulling plate 5 and the anchor plate 7 are fixedly connected by a plurality of pulling rods 10 that are the same in number and correspond one to one with the external insulating pulling connecting columns 6.

[0035] A conductive block 9 is provided on one side of the upper pulling disk 4 that is in contact with the tower foot 2. The conductive block 9 is electrically connected to the wire arranged inside the outer insulating pulling connecting column 6. The outer insulating pulling connecting column 6 is electrically connected to the pulling rod 10. There are no less than two groups of concentric equipotential rings 11 between the pulling rods 10. The concentric equipotential rings 11 are used to pull the rods 10 and conduct the current on the tower foot 2 into the ground.

[0036] In this embodiment, the tower base 1, the tower foot 2 and the underground pile foundation 3 are part of the existing tower installation structure, wherein the underground pile foundation 3 is located in the underground part, while the tower base 1 and the tower foot 2 are both located in the above-ground part. The tower base 1 and the underground pile foundation 3 are usually cast in concrete, and the interior of the structure is reinforced by a steel skeleton. On this basis, an upper pulling plate 4 is installed on the tower foot 2. Figure 2 、 4The upper pulling disc 4 is provided with a cross-sectional groove for the tower foot 2 in the combined state, so that the tower foot 2 and the upper pulling disc 4 can be stably assembled and fixed. Similarly, the lower pulling disc 5 and the tower base 1 are also fixed in the same manner as the upper pulling disc 4, and are connected between the upper pulling disc 4 and the lower pulling disc 5 by a plurality of external insulating pulling connection columns 6 arranged in a circular array. The external insulating pulling connection columns 6 are used to ensure that the connection between the tower foot 2 and the tower base 1 is more firm. At the same time, an anchor rod plate 7 is also provided on the periphery of the lower pulling disc 5. A plurality of fixed anchor rods 8 are connected to the bottom of the anchor rod plate 7 in a circular array. By driving the fixed anchor rods 8 into the ground, the The tensile strength of the anchor plate 7 is improved. At this time, the anchor plate 7 is connected to the lower pulling plate 5, so that the tensile strength of the tower foot 2 can be effectively improved. The above connection methods all adopt rapid assembly between structures. Compared with the form of concrete pouring, the assembly process is more efficient. In addition, the upper pulling plate 4 in this embodiment is fitted against the tower foot 2 and a conductive block 9 is provided on one side. The conductive block 9 is conducted downward through the wire arranged inside the external insulating pulling connecting column 6 and is finally electrically connected to the pulling rod 10 and the concentric equipotential ring 11. The significance of such a setting is that the above reinforcement structure is not only used alone as a structural component of the transmission tower, It also serves as a conductive structure of the transmission tower. In high-voltage or even ultra-high-voltage transmission networks, if the high-voltage transmission line breaks and is placed on the tower, or the insulator is damaged, causing the tower to be charged, the current will flow through the tower to the ground, making the tower foot charged. When the tower foot is charged, the current will diffuse from the tower foot to the surrounding soil, forming a potential gradient on the ground. The closer to the tower foot, the higher the potential, and vice versa. In this state, if people or livestock enter this potential distribution area, a potential difference will be generated between the two feet, forming a step voltage. When the step voltage reaches a certain value, there will be a step voltage electric shock hazard. Therefore, this embodiment not only uses the anchor plate to 7 is connected to the lower pulling plate 5 to improve the pull-out resistance of the iron tower. The outward pulling structural design can also balance the potential difference around the iron tower. On the one hand, it can promote the rapid introduction of current into the ground, and on the other hand, it can eliminate the step voltage generated by approaching people and livestock, thereby ensuring the safety of the power transmission network. It should be noted that due to the need to balance the potential difference of various parts, it is necessary to lay a conductive structure within a certain range around the tower foot, and the above-mentioned anchor plate 7 and fixed anchor 8 are set to meet the needs. Therefore, the technical solution combining the above-mentioned reinforcement and conductivity has outstanding substantial characteristics.

[0037] Example 2:

[0038] The upper pulling disc 4 and the lower pulling disc 5 are both composed of a pair of semicircular disc structures, and are fixedly mounted on the tower foot 2 and the tower base 1 respectively by means of bolt fastening.

[0039] In this embodiment, the disk structure and combination method of the upper pulling disk 4 and the lower pulling disk 5 are further disclosed. Considering that this combination installation method is relatively common in the prior art, it will not be described in detail here.

[0040] Example 3:

[0041] The upper pulling disc 4 and the anchor rod disc 7 are also connected by a plurality of insulating cables 12 arranged in a ring array.

[0042] In this embodiment, an insulating cable 12 is further connected between the upper pulling plate 4 and the anchor plate 7 to improve the bonding strength between the two, and the insulating cable 12 does not need to be conductive, so that the insulating cable 12 does not serve as a channel for current to flow. Since the insulating cable 12 is on the ground, this setting is beneficial to the safety of people or livestock after touching the insulating cable 12.

[0043] It should be particularly emphasized that a tension sensor can also be provided on the above-mentioned insulating cable 12. By setting the tension sensor, the stress change of the tower foot can be detected, thereby detecting the state of the high-voltage transmission tower. The above-mentioned scheme only provides a reinforcement method for one tower foot of the high-voltage transmission tower. In the actual construction process, the above-mentioned reinforcement needs to be performed on all four tower feet.

[0044] Example 4:

[0045] The upper pulling disc 4 , the lower pulling disc 5 and the anchor rod disc 7 are correspondingly provided with pulling connection threaded holes 13 for connecting the external insulating pulling connection column 6 , the pulling rod 10 and the insulating cable 12 .

[0046] In this embodiment, both ends of the insulating pulling connection column 6, the pulling rod 10 and the insulating cable 12 are connected to the pulling connection threaded holes 13 provided on the corresponding structure. The above structure can be fastened by bolts, threaded sleeves, or by referring to the instructions. Figure 6 , threaded fixation is performed directly by opening thread grooves at both ends of the insulating pulling connecting column 6, the pulling rod 10 and the insulating cable 12. Since the connection methods between the above-mentioned structures are diverse and relatively common, those skilled in the art can flexibly select the connection method according to their needs, which also does not exceed the protection scope of the specification.

[0047] Embodiment 5:

[0048] Conductive rings 14 are provided in the semicircular disk bodies on both sides of the upper pulling disk 4. The conductive rings 14 are fixedly connected to the conductive block 9. A connecting hole is provided on the conductive ring 14. When the external insulating pulling connection column 6 is fixedly connected to the upper pulling disk 4 through the pulling connection threaded hole 13, the wire provided therein is inserted into the connecting hole provided on the conductive ring 14, thereby electrically connecting the external insulating pulling connection column 6 to the tower foot 2.

[0049] In this embodiment, the specific method of electrically connecting the external insulating pulling connection column 6 and the tower foot 2 is further disclosed. The external insulating pulling connection column 6 is a columnar conductor structure with insulating material wrapped on the outside. During the installation process, it is connected to the pulling connection threaded hole 13 opened on the upper pulling disk 4 by threaded fastening. Unlike other pulling connection threaded holes 13, the pulling connection threaded hole 13 connecting the external insulating pulling connection column 6 is coaxially connected with the connection hole opened on the conductive ring 14, so that electrical connection is achieved after the external insulating pulling connection column 6 enters the conductive ring 14.

[0050] A tower foundation reinforcement construction method, using the above-mentioned tower foundation reinforcement structure, comprises the following steps:

[0051] Step 1: Fix the upper pulling disc 4 and the lower pulling disc 5 on the tower foot 2 and the tower base 1 respectively by fastening bolts, and connect the upper pulling disc 4 and the lower pulling disc 5 by the external insulating pulling connecting column 6;

[0052] Step 2: Anchor the fixed anchor rod 8 in the rammed earth layer below the ground. After the anchoring is completed, the anchor rod plate 7 and the fixed anchor rod 8 are fixedly connected in sequence;

[0053] Step 3: The anchor plate 7 is fixedly connected to the lower pulling plate 5 through the pulling rod 10, and two sets of concentric equipotential rings 11 are installed on the pulling rod 10. After the installation is completed, the pulling rod 10, the concentric equipotential rings 11 and the lower pulling plate 5 are covered with soil so that they are placed in the soil;

[0054] Step 4: Fix the upper pulling plate 4 and the anchor plate 7 together through the insulating cable 12 .

[0055] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A tower foundation reinforcement structure, comprising a tower base, tower feet, and underground pile foundations, wherein the underground pile foundations are fixedly connected to the tower base, and the tower feet are fixedly mounted on connection blocks provided on the tower base by assembly bolts; characterized in that: An upper pulling disc is fixedly mounted on the tower foot, and a lower pulling disc is fixedly mounted on the periphery of the tower base. The upper pulling disc and the lower pulling disc are connected by a plurality of external insulating pulling connection columns arranged in a ring array. An anchor plate is also provided on the periphery of the tower base, and a plurality of fixed anchor rods are connected to the bottom of the anchor plate in a circular array. The fixed anchor rods are anchored in the rammed earth layer below the ground. The lower pulling plate and the anchor plate are fixedly connected by a plurality of pulling rods that are consistent with and correspond to the external insulating pulling connection columns. The upper pulling disk is fitted against the tower foot and a conductive block is provided on one side. The conductive block is electrically connected to the wire arranged inside the outer insulating pulling connecting column. The outer insulating pulling connecting column is electrically connected to the pulling rod. There are also no less than two groups of concentric equipotential rings arranged between several of the pulling rods. The pulling rods and the current on the tower foot are introduced into the ground through the concentric equipotential rings.

2. The iron tower foundation reinforcement structure according to claim 1, characterized in that: The upper pulling disc and the lower pulling disc are both composed of a pair of semicircular disc structures and are fixedly mounted on the tower foot and the tower base respectively by means of bolt fastening.

3. The iron tower foundation reinforcement structure according to claim 1 or 2, characterized in that: The upper pulling disc and the anchor rod disc are also connected via a plurality of insulating cables arranged in an annular array.

4. The iron tower foundation reinforcement structure according to claim 3, characterized in that: The anchor plate and the concentric equipotential rings are all buried below the soil layer.

5. The iron tower foundation reinforcement structure according to claim 4, characterized in that: The upper pulling disk, the lower pulling disk and the anchor rod disk are correspondingly provided with pulling connection threaded holes for connecting the external insulating pulling connection column, the pulling rod and the insulating cable.

6. The iron tower foundation reinforcement structure according to claim 5, characterized in that: Conductive rings are provided in the semicircular disk bodies on both sides of the upper pulling disk, and the conductive rings are fixedly connected to the conductive blocks. A connecting hole is provided on the conductive rings. When the outer insulating pulling connecting column is fixedly connected to the upper pulling disk through the pulling connecting threaded hole, the wire provided therein is inserted into the connecting hole provided on the conductive ring, thereby electrically connecting the outer insulating pulling connecting column to the tower foot.

7. A tower foundation reinforcement construction method, using the tower foundation reinforcement structure according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Fix the upper pulling disc and the lower pulling disc on the tower foot and tower base respectively by fastening bolts, and connect the upper pulling disc and the lower pulling disc by external insulating pulling connecting column; Step 2: Anchor the fixed anchor rod in the rammed earth layer below the ground. After the anchoring is completed, the anchor rod plate and the fixed anchor rod are fixedly connected in sequence; Step 3: Use the pulling rod to fix the anchor plate to the lower pulling plate, and install two sets of concentric equipotential rings on the pulling rod. After installation, cover the pulling rod, concentric equipotential rings and lower pulling plate with soil so that they are in the soil; Step 4: Fix the upper pulling plate and the anchor plate together through the insulating cable.

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